Support for filter elements



Oct. 30, 1951 s. w. BRIGGS 2,572,981

SUPPORT FOR FILTER ELEMENTS Filed June 10, 1946 4 Sheets-Sheet 2 FIG. 2

dqaruW/ K M 59/665 Oct. 30, 1951 Filed June 10, 1946 FIG. 5

S. W. BRIGGS SUPPORT FOR FILTER ELEMENTS 4 Sheets-Sheet 3 08000 0&

gwuwwtm Oct. 30, 1951 s. w. BRIGGS 2,572,981

SUPPORT FOR FILTER ELEMENTS Filed June' 10, 1946 4 Sheets-Sheet 4 FIG. 5

Soupwwqk 1% 542/665 for the filter cartridges and also as conduits for the removal of clarified fluid.

Shoulders I9 are welded to the lower end of drainage tubes |8 a short distance above the discharge manifold for the support of the filter cartridges. Openings 20 are spaced along the drainage tubes I8 for the passage of clarified fluid during the operation of the filter. The upper end of the drainage tubes is threaded internally to receive a spider-like cap 2| through which unclarified fluid may flow to the upper area of the drainage tube. Release for excessive pressure in the filter casing is provided by a spring loaded valve 22 mounted in the upper end of the drainage tube. A spring 23 constantly urges the in disc 25 immediately above the sphere, thus spherical valve 22 upwardly into the opening 24 closing that opening and preventing by-passing of the filter cartridge during normal operation. If the pressure in the chamber 6 becomes excessive because of a plugged filter cartridge, for example, sphere 22 is moved downward against theaction of the spring, thereby allowingun filtered fluid to pass through opening 24. At the lower end of the spring there is a hole 25 in the supporting plate 2'! which provides an escape for the unfiltered fluid to the filter outlet.

Cap 2| is essentially a short section of pipe flanged at one end with a bar 28 across the face of they flange to act as a handle. The pipe section is threaded at 29 for engagement with the threads in the upper end of drainage tubes l8. Since cap 2| is, therefore, tubular, it does not interfere with the flow of fluid to the pressure release valve 22.

During the assembly of a filter, a complete filter cartridge comprising a filter harness and filter mass is slippedover a drainage tube It so that the lower end of the cartridge rests on shoulder l9.- Cap 2| is then screwed on to the upper end of the drainage tube. Since the cap bears on the upper end of the filter cartridge, tightening of the cap holds the cartridge rigidly in place about the drainagetube l8 and between the shoulder 19 and cap 2|. Thus each of the filter cartridges is firmly supported on the drainage manifold, Legs 30 are located at intervals around the circumference of the drainage manifold to increase the ruggednessof the structure. 7

In'Figure 2 the mounting of the filter cartridge 2 upon the drainage tube I8 is best illustrated. Gasket 3| prevents leakage of unfiltered fluid between shoulder l9 and the lower end flange 32 of the filter cartridge. Similarly, gasket 33 prevents leakage between the cap 2| and the upper end flange 34 of the filter cartridge. During the operation of the filter, contaminated fluid passes from the outside of the filter cartridge 2, gen-,

erally radially through it,'to the openings 2|) in drainage tubes l8 and then to the filter outlet.

In case of excessive pressure upon the filter casing, by-passing of the filter cartridge through valve 22 is possible.

Referring to Figure 3 a filter cartridge, indicated generally as 2, is illustrated in which a filter mass 35 is supported by a filter harness, indicated generally as 36. The filter mass may be of, any of a number of types but it is anticipated because of more effective use of the filter material it is preferable that the discs be square, as shown in Figure 5.

In order to provide a rugged compact filter mass which will withstand ordinary handling and is suitable for use as a refill, plates 31 are placed at the end of the filter mass. The discs are then compressed and a connection 38 attached to the two plates 31 to hold them in fixed, spaced relation to each other. Upon release of the compressive force, the connection 38, which-may be of wire, maintains the filter mass in a compressed condition of relatively high rigidity and strength. Often it is desirable to cover the filter mass with acloth or'sock, such as 39. This sock acts as a strainer during the operation of the filter and also contributes to the ruggedness of the refill.

Inmany cases, it is desirable to have a handle 40 attached to the upper plate 31 to facilitate the installation and removal of a filter mass. The handle illustrated in Figures 5 and 6 is merely a wire'which after using may be placed around theedge of the plate 31, as shown in the drawings.

upper end. Then if particles of the filter material should become loosened from the mass,

the perforated tube would act as a strainer. Se-j cured to thelower end of the central tube is an end flange 32. This flange may either be .welded, screwed, or rolled onto the central tube. In the form shown in Figure 3a lip 43 is spun onto the face of the flange and forms'a recess for holding gasket 3|. With this construction, it is insured that a gasket 3| will lie between shoulder l9and end flange 32 to prevent leakage of any unfiltered fluid between .those two flanges into central tube 4|. The possibility of the mechanic servicing the filter forgetting to install a gasket before placing the harness in position is eliminated.

Afloating plate 44 is slidably mounted'upon tube 4|. When the filter cartridge is assembled, spring 41 is compressed; consequently, it constantly urges floating plate 45 and flange 32 apart.

A second end flange 34 is detachably mounted at the end of central tube 4| remote from flange 32. End flange34 is attached to a short section of tubing 48 of a diameter large enough to fit closely over the outside of tube 4|. Tube 48 is dimpled at 49 and 50 for engagement withslots 5| and 52 in the upper end of tube 4|. Slots 5| and 52 should be generally L shaped with preferably an acute angle between the arms of the L so that the force of spring 41 acting through the filter mass 35 and thus pushing upwardly against end flange 34 will tend to lock dimples 49 and 50 more firmly in slots 5| and 52. It is preferred that flange 34, like end flange 32, have a lip spun on its face for the positive engagement of a gasket. v

In the assembly of a filter cartridge the helical spring is slipped, down along the tube 4| 3162i ri'efilai'te in 'anwmatemet the end at the l'i'olilth'e'fiari'ge firmly in mace. The"as's'en'nhled filter cartridge is then ready for Tplabinghn the filter'dnsing. v Y

can important feature 'offthis inveritio'n'is "that the 'filter 'm'ass is continuously"compressed by some resilient means. If the filter mate'riall Shrinksfais is the "usual case during the "period of operation, the resilient "'means' maintain the fil- 'term'a'ss in acompre'ssed condition and prevents around the ends of the jm'ass 'or between the inedividu'aldi'scs.

Even though the"filter mass is resiliently stipim' rte'd, "the 'eom'plete -cartridge 'assembly is rigidly mounted Within'the filter basing. 'The rigid'nature "of the hirness inwhih flanges are securely attached to the ends -of'a' central tube allows the use of rigid means to support'tl'ie harness." No "matter how "tightly the harness is held -in position there 'is no imdu'e compression 'of'tlie filterlri'ass bieoau'se of the 'fixefi position 'ofendfi'anges f32 a'nfi 34 at the end of drainage tape "41. This advantage is "obtained by the 'i'mi'que structure 'inwliich a slidablyflnounted 'Dlzteisintermedia'te' the ends of the filter harnessf'and isentirely 'freefr'om the action'of any force used to hold the harness in fp'lac'e. "Thus thejcompres'sionnf"thefilter mass is a result only oft he action'o't'spring 4'! and is 'n'ot'influ'en'ced bythe for'ces used'to support the cartridge.

"Itis apparenttha't in order to replzncea filter cartridge, it "is merely 'ne'cessary to "remove the eover-ofthe'filter andthen ren'iove cap 21,, which isscrewed'onto the drainage tube; I18. 'The entirefilter cartridge including the filter mass 35 and the filterharness maybe then lifted-from its position Surrounding the drainage tube and .an entirelyiiw assemble jput inits place. On the ,dthr'hahdfoneofthe advantages of "this ap'pa fra'tus is theft it is not necessary to'jrep'lace the-enitirejf filter oartridge. The idetac'heibly 'm'oun'tel'i "end'na'nge "34 ,jm'ay -be :remqveu from the central tubell byturriingtlie cap'slightlyi'and then'liftin'g git. "It now possilo'le"to slide 'theifilter mass 35 min its position oni'the filter harness and rep ece it with 'a new'filterv mass.

."Inas'mu ch as the filter harness "is made of materials considerably more resistant than the "filter 'mf'elteifials used in the imas's, it anticipated that eittibe xt naifig tottii feas peinrovidingte"cope dl ilt flohitfi'i'fisid fid'th Blits'i'de' '(TFfiHe 'a-Sifii-ZI a ..cov .er .closing the upper .end of the feii'sihfa shouflaeri means secured Tto ftfie'itiibe; "said: tiibe h ving openings 'th'er'i'n' ,ei-boVe "the shoiilci'r means, {.3 perforate 'eentrall .ti he ''iieifelih'g the tube Ia-ndihaAiihg .affi'rst ena flange seuret1tq o'h'e .end, 1 an .anniilar tplate eonoentric with iahiifslidalfale on the central tube, "resilient means i b'tweeii the first end flange iand ;.plei-te 'ur g'ing them 'zi peiit, a: second end fiangefdetahalbly, se eure'Et-o theeiid g 'ffithe central ltiibe-fi-p positeTthe first mange adapted \to .engageIa ffilt'ei' lement" -inffpositi'on ,ar oundra ioen'tralltlibe andehol d itagaliristthe gannlaix-plate means-engaging .the tipper end. dfgtlie tr be and the. -secor kl -enii, flange on the cer'ittzil tube to h-old the central tribe ifir'nily in pee-men ground the 0111131613 ;ti be, seid shoulder means fehgagingthe first endflange secured to the 158mm tube, and ;meansclosing the end -ofthe tr be to prevent by passing 10f the filter element by unfiltered fluid. r v

. mA'suppor-t for ea filter element fzorr prising'get :easing .having an inlet, an outlet tubeextenilin'g into the casing, a cover closing :theend-oi the leasing, :shoulder means secured to the outlet -tu'lie, s'azid -;tube having *openings therein -'-above thezshouldr. means; a ,perfo'rate central .-tuh'e-.en- 'oir'oli'ng lthe outlet itube rand ahaing azfirsteend flange s'ecured toione encLtzan, annulatr plate concentric with agnd slidable on the centraltubeseakin'g m'eans sii'pported by the :plate tengaging' the p leite hind ithe centi 'dl tube to prevent flow-of "un filtere'd fiuid therbetween, fresilent imeans'zb'etw en the-firs'vend flange a'n'd pla'te urging them "apart, a seohd "end fl'alnge det'adhdbly :secureilfto {the end of -the central tube opposite the first end flange-adapted to engage a miter-element in 'pdsitibnarolintl 'a'centr'l tube a'snd hold it-dgtiins't the z'ui'milarfilatte, means 'en'ga'gih'g the end o'f *the'otitlt ttibean'd the seconchend fizmge hn the i'ceriffal tube to hbld "the -'cenn-a1 tlibe firmly in :pos'iti'on "around the youtl'et "tube, said shoi il'der replacement of the 'compl'ete'filt'ercartriiige'conicasing having an inlet, an outlettube' extending intotne'casing, a coverclosingthe end of the casing, shoulder means secured to the outlet tube, said outlet tube'havi'ng' openings therein between theslrioulderv means and the endfof the tube, a perforate "central tube encircling the outlet tube and having a first end flange secured to one end, an annular plate concentric with and slidable on the centraltube, sealing meanssupported by the plate engaging the plate and the central tube to prevent flow or unfiltered fluid therebetween, resilient means :between the first end flange and plate urging them apart, a second end flange detachably secured to the endof the central tube opposite the first end flange adapted to engage a filter element in position aro'und the central tube and hold it against the annular plate, means engaging the end of the outlet tube and the secand end flange on the central tube to hold the central tubefirmly in position around the outlet tube, said shoulder means engaging the "first end flange secured to the central tube, gasketmeans between the first end flange secured to thecentral tube and the shoulder means, othergasket means between the second end flange and the means engaging the end of the outlet tube'and means closmg; the upper end of the outlet tube to prevent flow of unfiltered fluid past the ends of the central tube.

4. In combination with a filter casing having an inlet, a perforate outlet tube extending into the casing, and a cover closing the casing, means for removably supporting a filter element within thecasing comprising shoulder means on the outlet tube below the perforations therein, a perforate central tube encircling the outlet tube, a lower flange secured to the lower end of the central tube, an upper flange secured to the upper end of the central tube, one of said flanges being detachably secured to the tube, a plate slidable on the central tube between the'upper and lower flanges, resilient means between the slidable plate and one of the flanges secured to the central tube adapted to urge the slidable plate against a filter element positioned between the plate and the other flange, means secured to the upper end of the outlet tube engaging the upper flange to hold the central tube firmly in position around the outlet tube with the lower flange against the supporting flange, and means closing the outlet tube to prevent by-passing of the filter element by unfiltered fluid.

5. A support for a filter element comprising a casing having an opening providing communication between the inside and outside of the casing, a tube extending into the casing providing a conduit from the inside to the outside of the casing, a cover closing the upperend of the casing, shoulder means secured to-the tube, saidtube having openings therein above the shoulder means, a perforate central tube encircling the tube and having a first end flange secured to one end, an annular plate concentric with and slid-V able on the central tube, resilient, means between the first end flange and plate urging them apart,

a second end flange detachably secured to the end of the central tube oppositetheflrstflang'e adapted to engage a filter element in position around a central tube and hold it against the annular plate, means engaging the upper end of the tube and one of the flanges on the central tube to hold the central tube firmly in position around the outlet tube, said shoulder means engaging the other flange secured to the central tube, andmeans closing the end of the tube'to prevent by-passing of the filter element byunflh tered fluid.

6. A support for a filter element comprising a casing having an inlet, an outlet tube extending into the casingja cover closing the end of the casing, shoulder means secured to the outlet tube, said tube having openings therein above the shoulder means, a'perforate central tube eiicir cling the outlet tube and having a first endflange secured to one end, an annular plate concentric with and slidable on the central tube, sealing means supported by the plate engaging the plate and the central tube to prevent flow ofunfiltered fluid therebetween, resilient meansbetween the first end flangejand plate urging them apart, ,a second end flangedetachably secured to the end of the central tube opposite the first end flange adapted to engage a filter element in position around a cen'tral'tube and hold it against the annular plate, means engaging the end. of the outlet tube and one of the flanges on the central tube to hold the central tube firmly in position around, the outlet tube, said shoulder means engaging the other flange secured to the central tube, and means closing the end of the outlet tube to prevent by-passing of the filter element by unfiltered. fluid. j

'7. A support for a filter element comprising a casing havingan inlet, an outlet tube extending into the casing, a cover closing the endof the casing, shoulder means securedito' the outlet tube, said tube having openings, therein above the shoulder means, a perforate central tube encircling the outlet tube and having a first,end flange secured to one end, an annular plate concentric with'and slidable on the central tube, sealing means supported by the plate engaging the plate and the central tube to prevent flow of unfiltered fluid therebetween, resilient means, between the first end flange and plate .urging them apart, a second end flange detachably, secured to the end of the centraltube opposite the first flange adapted to engage a filter element in position around the central tube and hold it against the annular plate, means engaging the end of the outlet tube and one of theflanges on the central tube. to hold the central tube'firmly in position around the outlet tube, said shoulder meansengaging the other flange secured to the central tube, gasket means between the firs't endrflange secured to the central tube and the shoulder means, other gasket means between the second end flange and the means engaging the end of the outlet tube, and means closing the upper end of. the outlet tube to prevent flow of unfiltered fluid past the ends of the central tube.

' 8. In combination with a filter casing having an inlet, a perforate outlet tube extending into "the casing, anda cover closingthe casing, means for removably supporting a filterelement within the casing comprising shoulder means on the outlet tube below the perforations therein, a perforate central tube encircling the outlet tube, a lower flange secured to the lower end of the central tube, an upper flange secured to the upper end of the central tube, said uppe,r flang beifi detachably' secured to the tube,' a plate slidable on'the central'tubebetween the upper and lower flanges, resilient means between the slidable plate and the-lower flange securedto the centraltube adapted 'to'urge the slidable plate againstfafilter element positioned between the plate and the other flange, means secured to the other end of the outlet tube engaging the upper flange tohold the central tube firmly in position aroundgthe outlet tube with the lower flange against the supporting flange, and means closing the outlet tube to prevent by-passing of the filter element by unfiltered fluid.

9. Apparatus for the support of a filter element comprising a casing having an inlet, an outlet tube opening into the casing for the reception of filtered fluid, shoulder means secured around the outlet tube in a fluid-tight manner between the opening of the outlet tube and the casing, a central tube concentric with the outlet tube, a first end flange secured to one end of the central tube, a sliding annular plate mounted on said central tube, sealing means engaging the sliding annular plate and the central tube to prevent flow of fluid therebetween, resilient means engaging the first end flange and the sliding annular plate to urge them apart, a second end flange detachably secured to the end of the central tube opposite the first end flange and adapted to engage the end of a filter element surrounding the central tube between the sliding annular plate and the second end flan e, said central tube having openings therein between the sliding plate and second end flange for the flow of fluid discharged from the filter element into the outlet tube, one of said end flanges resting on the shoulder means, means engaging the other end flange to hold the central tube firmly in position on the shoulder means around the outlet tube, and means for preventing direct flow of the fluid to be filtered past the end of the filter element opposite the shoulder means to prevent by-passing of the filter element by the unfiltered fluid.

10. Apparatus for the support of a filter element comprising a casing having an inlet, an outlet tube opening into the casing for the reception of filtered fluid, shoulder means secured around the outlet tube in a fluid-tight manner between the opening of the outlet tube and the casing, a central tube concentric with the outlet tube, a first end flange secured to one end of the central tube, a second end flange secured to the end of the central tube remote from the first end flange, one of said end flanges being detachably secured to the central tube, a sliding annular plate mounted on said central tube, sealing means engaging the sliding annular plate and the central tube to prevent flow of fluid therebetween, resilient means engaging the sliding annular plate and one of the end flanges to urge them apart and urge the annular plate against a filter element, the central tube having openings therein in the region of the filter element to permit flow of filtered fluid from the filtered element to the outlet tube, one of said end flanges resting on the shoulder means, means engaging the other end flange to hold the central tube firmly in position around the outlet tube, and means for preventing direct flow of the fluid to be filtered past the end of the filter element to prevent by-passing of the filtered element by unfiltered fluid.

SOUTl-IW'ICK W. BRIGGS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 256,853 Pitt Apr. 25, 1882 1,581,947 Hobbs Apr. 20, 1926 2,137,556 Young Nov. 22, 1938 2,364,617 Bolser Dec. 12, 1944 2,367,745 Wicks Jan. 23, 1945 2,454,030 Besore Nov. 16, 1948 2,454,033 Briggs L Nov. 16, 1948 2,459,376 Hallinan Jan. 18, 1949 

